Synopsis: The science of funny is back! At work, physicists Leonard and Sheldon and their geek pals conquer the cosmos. At home, real life from dating to driving conquers them. This season, Leonard gets a girl. So does Sheldon. (Sheldon?!) Howard drives the Mars Rover into a ditch. Raj woos a terminator. Gorgeous girl-next-door Penny falls under the spell of Age of Conan. And super-smart, überconfident Leslie Winkle reduces mere men to spineless jellyfish. Twenty-three laugh-filled episodes from series creators Chuck Lorre (Two and a Half Men) and Bill Prady (Dharma & Greg) and a talented cast with astronomical comedy I.Q.s show why Big Bang is such a big hit.

Special Features: US ONLY: MUST REDEEM ULTRAVIOLET OFFER BY 07/10/2014

• Physicist to the Stars: Real-Life Physicist/UCLA Professor David Saltzberg’s Consulting Relationship to the Show• Testing the Infinite Hilarity Hypothesis in Relation to the Big Bang Theory: Season Two’s Unique Characters and Characteristics• Gag Reel

Editor's Note

Johnny Galecki (ROSEANNE) and Jim Parsons (JUDGING AMY) star as Leonard and Sheldon, two socially inept scientists who, while accustomed to probing the secrets of the universe, are totally unprepared for the greatest mystery of all: women. When a beautiful blonde, Penny (Kaley Cuoco), moves next door and invades their dweebish den, these friends have their lives turned upside down. Plenty of hijinks are in store for the two roommates as they get a crash course in the ways of the opposite sex. In the second season, both Leonard and Sheldon find love, but will they also find the answers to complex astrophysics equations?